Mat Board Calculator
Equal Borders
Calculate mat with equal borders on all sides
Weighted Bottom
Mat with a wider bottom border for visual balance
Double Mat
Calculate dimensions for a double mat (two layered mats)
Formula
Mat Outer = Art + (2 × Border) | Opening = Art - (2 × Overlap) | Double Mat: Inner Opening = Art - 0.5", Outer Opening = Inner Opening - (2 × Reveal)
Frequently Asked Questions
What is a mat board?
A mat board is a thick cardboard border placed between artwork and the frame glass. It provides visual separation, protects the art from touching the glass, and adds a professional finished look.
What is a weighted bottom mat?
A weighted bottom mat has a slightly wider bottom border (typically 0.5" extra). This compensates for an optical illusion where equal borders appear bottom-heavy, making the presentation look more balanced.
What is a double mat?
A double mat uses two mat boards stacked together with the inner mat slightly larger opening, revealing a thin strip (1/4" typical) of the inner mat color. This adds depth and a decorative accent.
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